A wooden stick weapon measuring roughly 72 inches in length and one inch in diameter. Length varies with the height of the practitioner and generally is the same as the distance from the floor to just above the top of the head. The diameter of individual weapons can can vary slightly. Within Tensoku Ryu we standardize on one inch diameter weapons.

Some Bo are tapered such that the midpoint along the length of the weapon may be thicker than the two ends. These weapons provide improved performance characteristics and are useful for tournament and similar performance work. For contact work we utilize weapons with a uniform one inch diameter.